Noise Cancellation for Small Type Generators

Mahdin, Saimum; Haque, Mahiul; Rafsan, Shafwat Kabir; Anjum, Tanvir; Rahman, Md.Tashrik

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dc.contributor.author	Mahdin, Saimum
dc.contributor.author	Haque, Mahiul
dc.contributor.author	Rafsan, Shafwat Kabir
dc.contributor.author	Anjum, Tanvir
dc.contributor.author	Rahman, Md.Tashrik
dc.date.accessioned	2020-11-01T13:20:06Z
dc.date.available	2020-11-01T13:20:06Z
dc.date.issued	2018-11-15
dc.identifier.citation	[1] Cuesta M, Cobo P. Active control of the exhaust noise radiated by an enclosed generator. Applied Acoustics 2000;61(1):83±94. [2] Beranek LL, VeÂ r IL. Noise and vibration control engineering. Principles and applications. New York: John Wiley and Sons, 1992. [3] Elliott SJ. Down with noise. IEEE Spectrum, 1999 June: 54±61. [4] Nelson PA, Elliott SJ. Active control of sound. London: Academic Press, 1992. [5] Hansen CH, Snyder SD. Active control of noise and vibration. London: E&FN Spon, 1997. [6] Cobo P, Ranz C, Santiago JS, Pons J, Siguero M, Delgado C. Insertion loss measurements of an acoustical enclosure by using sound power and MLS methods. AcoustSocAm1998;103(5/2):3074. [7] Cuesta M, Cobo P. Control activo de una fuente encapsulada utilizando una referencia multiple. Proceedings of Tecniacustica 1999, Avila, Spain. [8] Cuesta M, Cobo P. A passive/active hybrid system for control of the noise radiated by a small generator. Proceedings of Forum Acusticum 1999, Berlin, Germany. [9] Okamoto Y, Bodem H, Abom M. Active noise control via side-branch resonators. J Acoust Soc Am 1994;96(3):1533±8. [10] Cobo P. Control Activo del Ruido. Principios y Aplicaciones. Madrid, CSIC, ColeccioÂ n Textos Universitarios no. 26, 1997. [11] Munjal ML, Eriksson LJ. Analysis of a hybrid noise control system for a duct. J Acoust Soc Am 1989;86(2):832±4. [12] Kuo SM, Morgan DR. Active noise control systems. Algorithms and DSP implementations. New York: John Wiley & Sons Inc, 1996. [13] Optimisation of an active control system to reduce the exhaust noise radiated by asmall generator MarõÂa Cuesta *, Pedro Cobo Instituto de AcuÂstica, CSIC, Serrano 144, 28006 Madrid, Spain	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/633
dc.description	Supervised by Prof. Dr. A.R.M Harunur Rashid	en_US
dc.description.abstract	A simple, effective design for enclosing portable generators to reduce the radiated noise is an idea that seems to be desired by the consumers in this market. This investigation is to determine the feasibility of producing such an enclosure for a generator. Several engineering aspects are incorporated in the design of the enclosure. The first, and probably the most paramount, are the acoustical effects of the enclosure itself. The investigation follows the theories for insertion loss of a close fitting enclosure. The thesis examines the system behaviour of a close fitting enclosure that most acoustic text books ignore and how the material stiffness, density and source-to-enclosure distance affect the insertion loss and effectiveness of the enclosure. Measured and theoretical sound pressure level around the generator before and after the application of the enclosure are presented using standards described by ISO standard 1344. The second important consideration for the enclosure design involves the heat transfer characteristics. The requirements of cooling air to the generator are discussed. Also presented are some acoustic design considerations to prevent any “direct line of sight” to any of the necessary openings which will help in the overall insertion loss. The use of an optimal engineering design technique is presented, demonstrating its strengths and weakness in this application.	en_US
dc.language.iso	en	en_US
dc.publisher	Department of Mechanical and Production Engineering, Islamic University of Technology, Board Bazar, Gazipur, Bangladesh	en_US
dc.title	Noise Cancellation for Small Type Generators	en_US
dc.type	Thesis	en_US